Re: [DNSOP] I-D Action: draft-ietf-dnsop-attrleaf-12.txt

Mats Dufberg <mats.dufberg@iis.se> Thu, 26 July 2018 08:45 UTC

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From: Mats Dufberg <mats.dufberg@iis.se>
To: "dnsop@ietf.org" <dnsop@ietf.org>
Thread-Topic: [DNSOP] I-D Action: draft-ietf-dnsop-attrleaf-12.txt
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Date: Thu, 26 Jul 2018 08:45:37 +0000
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Subject: Re: [DNSOP] I-D Action: draft-ietf-dnsop-attrleaf-12.txt
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I prefer a regex and I think that Dave's "_ta-.*" makes most sense. An explanation that it is a regex and that the exact format of the name is found in RFC 8145 is needed.


Mats

---
Mats Dufberg
DNS Specialist, IIS
Mobile: +46 73 065 3899
https://www.iis.se/en/
 

On 2018-07-25, 21:58, "DNSOP on behalf of John Levine" <dnsop-bounces@ietf.org on behalf of johnl@taugh.com> wrote:

    In article <9ac469b7-031a-4d8c-53d0-a82abca0d495@dcrocker.net>et>,
    Dave Crocker  <dcrocker@bbiw.net> wrote:
    >On 7/25/2018 10:59 AM, Bob Harold wrote:
    >> Dot "." has special meaning in DNS, so I would prefer:
    >> 
    >>  Â Â  _ta-*
    >> 
    >> Not regex, but a common wildcard usage.
    >
    >wfm.
    
    I suppose.  A plausible actual regex would be
    
       _ta(-[0-9a-z]{4}){1,12}
    
    which might be a bit dense.  That's not quite right because the
    numbers in the label have to be sorted, but there's no way to say that
    in a regex other than enumerating them which would be bulky.
    
    Whatever you do, please put include some text reminding people that it's
    a conceptual glob stype wildcard, not a DNS wildcard.
    
    R's,
    John
    -- 
    Regards,
    John Levine, johnl@iecc.com, Primary Perpetrator of "The Internet for Dummies",
    Please consider the environment before reading this e-mail. https://jl.ly